[Haskell-cafe] About the import module

Hi there, If I import a module and do not explicitly point out the entities I have imported. And I want the ghc to point out the entities automatically. Is there any method to do this? any methods to have the ghc point out the entities I import and export? Because there are so many files and I don't want to change them one by one, so I just want to find if there is a simple and automatic way to have the entities pointed out. Thank you in advance!